Fluid fuel burner control



Feb. 23,4937.

w. s. GORDON, JR

FLUID FUEL BURNER CONTROL Filed Aug. 4, 1934 y j 171a %c .m/ fwm.

Panama. 23,1931 2,071,876,

UMTED STATES PATENT QFFICEIZ FLUID minivan con'rnoL William s. Gordon, a, North Tonawanda, N. 1 assignor to Roberts-Gordon Appliance Corporation, Buffalo, N. Y.

Application i, met, Serial No. 738,553

a (cl. 251-34) This invention relates to valves for controlling ferent openings according to the amount of heat the supply of fuel to fluid fuel burners. desired from the burner, it is desirable that-ac- The objects of this invention are to provide curate positioning of the movable valve member valves of this kind by whichan accurate coinwith relation to its seat be ,efiected. This may 5 trol of fuel supplied to the burner can be obbe done in any suitable or desired manner so that 5 tained; also to provide valve and control means a relatively large movement of the hand-operfor burners which are so constructed that a ated control results in a small movement of the relatively large flow. of fuel takes place for a movable valve member. For this purpose, a leshort interval of time during the opening of the ver sills shown in the construction illustrated, fuel supply valve, to facilitate the proper ignitwhich is pivoted at one end at 35 on the bracket 10 mg of th fuel t th burner; and l t 1m- 29, and the other end of which may be conprove the construction of valves for use in connected withjhe h per djusting means nection withcontrol means for fluid fuel burn- (not Shown) for the valve. The valve stem 2? are in other respects hereinafter specified, is pref ra y s t ed at ts up er d; a d th In the accompanying drawing: lever 30 extends into the slot and is pivoted to 15 form of fuel supply valve embodying this inven- D h h limits 8 d d mfivemenii tion and a portion of the actuating mechanism the free end of e lever 30. therefor, Fuel supply vaves as heretofore constructed Fig.1 is a central, sectional elevation of one the Valve S 2? 33 represents a p I 2 Fig. 2 is a fragmentary, central, sectional 1 usually have a movable member having a plate vation of the valve seat and the movable memor disk It arranged togseat on h pp r ace ber of the valve shown in Fig. l. of the valve seat ,to close the valve. With a Fig. 3 i a, b ttom plan n w of th mo abl valve of this type, a regulation of the flow of member of the valve shown in 2. fuel is difiicult, for the reason that even a very Fig, 4 1 a l v ti partly i ti of th slight movement of the plate or disk it from movabl member of a v lv gfslightly modified the seat of'the valve produces a relatively large t ti n, flow of fuel through the valve, so that accurate Fig. 5 is an elevation,partly in section of still v adjustment of the disk It for small valve openanother modified form of the movable ve ngs is extremely im ult- V v '01 this mind member. v p have also been provided with downwardly ex 30 Fm 6 1s sectional plan View on line tending skirt portions H guided in the usual cy- 1 Fig; 5. lindrical bore or opening of the valve, and such My improved valve and controlmeans shown skirts have been provided with deformations of m t accompanying drawing are s in n, various types, such for example as slits or cuts 35 nection t a gas bu it shown) 1 the 12 in the skirt portion, which, for example, may 5 conversion type adapted to be installed'in a be of inverted. v-shape. Even with such skirts, heater constructed for the consumption of solid an accurate control of the minimum fuel flow meL is difilcult, since even with these deformations The valve G, a more clearly shown in 1; 1, a variation of a very small fraction of an inch.

40 includes a. seat 25 through which a passage for Produces a a v y great variation in the flow 40 the fluid fuel is formed. A movable valvememof fuel fihl'ollgh the v I ber cooperates with the valve seat and is adjustn accm'dance with my v n; I provide able m a n n p p or recess '25 in the valves with skirt portions of the type-heretofore t, t valve member in t particular used, and also with deformations therein such'as t m shown having a t 21 which the inverted V-shaped cuts, but I arrange these 45 tends outwardly through the valve, and thevalve C in Such a manner that the pices of the member may b moved u an as shown i cuts are spaced a distance below the upper ends Fig.2, to vary the amount of fuel flowing through 0f the Skirts, h cOn lderable upward movethe v In theaouatmcWm t t t ment of the valve is possible before fuel can pass 5 valve stem 21 passes through a'base member or through thedeformations or cuts in the skirt. I

plate 2| rigidly secured to the valve housing and also provide means for'permittin the minimum having a standard or bracket 28 mounted thereflow of fuel through the valve before the deformaon. V V'Ihis type of valve is desirable for use in tions in the skirt begin to pass out of registration connection with ahead-operated control mechwith thecyiindrical aperture of the valve seat, animi, and in order to set the valve for dif-. ,In. the construction shown inl iga'l m3, 1pmof smaller diameter than the cylindrical bore or aperture 26 in the valve seat, and the difference in diameters of the skirt portion and'the bore 26 is such as to permit the minimum flow of fuel to pass through the valve. The difference in diameters may be made quite small, and I have found that'with certain types of valves a difference in diameter of .006 Man inch is sufiicient to provide for the minimum flow of fuel before the cuts or deformations I2 of the skirt are moved above the upper edge of the bore 26 of the valve scat.- The difference in diameters of the valve seat and the bore may, however be varied to suit the particular installation in connection with which the fuel supply valve is used.

In Fig. 4, I have shown a valve with a skirt portion 15 of modified construction. This skirt portion is preferably of such diameter as to form a snug sliding fit within the bore 26 of the valve seat and the skirt portion is also provided with cuts or deformations 16 similar to those shown in connection with Figs. 1 to 3. In the construction illustrated, however, the skirt portion 16 is spaced a slight distance below the valve disk 10 and the upper wall of the skirt portion is provided with one or more small apertures 11 of the correct size to permit the minimum quantity of fuel to pass through the valve. It will, consequently, be obvious that if the movable member of the valve shown in Fig. 4 is raised so that the plate or disk 10. clears the valve seat, fuel will immediately pass through the aperture or apertures so as to provide for the minimum flow of fuel. In this construction, a sleeve or collar 18 may be arranged between the skirt portion 15 and the disk or plate 16 of the movable member of the valve. After the minimum fuel. supply has passed, the valve may be moved to various positionsto expose more or less of the deformations or cuts 16 in the skirt portion.

In Figs. 5 and 6 is illustrated a valve having a 'skirt portion which is so formed as to provide for an initial relatively large flow of fuel during the initial opening movement of the valve mem her. In this construction, the skirt portion 6601' the valve is provided at the portion thereof adjacent to the plate or disk 10 with constricted portions 6| of materially less diameter than the diameter of the bore 26 of the valve seat, and below these constricted portions 8|, the skirt portion is of greater diameterso as to either fit snug- 1y within the valve seat,-or it may be of slightly lessdiametersthan that of the bore 26 as described ln connection with Figs. 1 to 3. The vertical length of the constricted portion of the skirt is preferably somewhat greater than the vertical length of the bore 26 of'the valve seat, so that when thepla'te or disk 10 is raised from contact with the seat, a relatively large volume of fuel will flow between the constricted portions 6| of the skirt and the valve seat, and thus produce an initial large flow of gas to insure proper lighting of themain burner. Upon further upward movement of the valve, the portion 62 of greater diameter will enter into the bore 26 of the valve to produce the minimum flow by the passageof gas only through the space between said portion 62 and the wall of bore 26 or, if desired, the minimum flow can be obtained by means of'an aper-- ture througha constricted portion or, as indicat'e'd in Fig. 4, the skirt of this valve may also be provided with deformations or cuts 83 to provide for further graduation of the flow of fuel through the valve. 1

The constricted portion 8| of the skirt portion of the valve is preferably provided at intervals with ribs or ridges 84 extending outwardly beyond the constricted portion to form a relatively snug fit withinthe bore 26 to insure a proper guidance of the skirt 60 within the bore of the valve.

when a valvewith a skirt portion, such as shown in Figs. 5 and 6, is employed in connection with a burner control, another advantageous result develops, namely, that the gas initially supplied to the burner is materially greater than the corresponding supply of air admitted to the burner, since while the skirt portion is in a position to by-pass a relatively large amount .of gas the air damper of the control means E will still be either closed or only very slightly open. This is of advantage in that better ignition of the burner has been found to result when the initial air supply is less than that required for efficient combustion, since under such circumstances; there is less tendency of the flame to back-fire into the mixing tubes of the burner.

I claim as my invention:

1. Means for controlling the flow of fuel to a fluid fuel bumer, including a fuel supply valve which is adapted to pass fuel to the burner and (by-pass for fuel effective when said movable valve member has been moved so that said disk is in a slightly open position to permit a large flow of gas through the valve and which by-pass becomes reduced to an extent such that only a minimum of gas flows through said valve upon farther movement of said movable valve member into open position, and said valve having deformations in said skirt which when said valve is still farther moved towards open position, enables a large volume of gas to pass through said valve.

2. Means for controlling the flow of fuel to a fluid fuel burner, including a fuel supply valve which is adapted to pass fuel to the burner and compi islng a seat surrounding the valve opening, a valve member having a substantially flat disk arranged to cooperate with said seat to effect a closing of said valve, and a skirt extending below said disk through said seat into said valve opening, said skirt having the portion thereof adjacent to said disk provided with parts spaced from said seat to provide a free flow of gas immediate- -ly upon the movement of said disk away from said seat, and a portion arranged at a greater distance from said disk and which is adapted to approach more closely to'the sides of said valve openingto restrict the flow of gas, and which is provided with deformations at a greater distance from said disk than said latter portion through which fuel may flow in accordance with the distance of said disk from said seat, whereby aninitial large flow of fuel is provided on first opening said valve and a restricted flow of fuel after the initial opening movement of said valve.

' WILLIAM S. GORDON. J a. 

